Heavy-duty mounting back



FIG. 1 is a perspective view, taken from the front and right, of theheavy-duty mounting back of the present invention;

FIG. 2 is another perspective view, taken from the rear and left, of theheavy-duty mounting back shown in FIG. 1;

FIG. 3 is an enlarged top view of the heavy-duty mounting back shown inFIG. 1;

FIG. 4 is an enlarged front view of the heavy-duty mounting back shownin FIG. 1;

FIG. 5 is an enlarged bottom view of the heavy-duty mounting back shownin FIG. 1;

FIG. 6 is an enlarged side view, taken from the left, of the mountingback shown in FIG. 1;

FIG. 7 is an enlarged side view, taken from the right, of the mountingback shown in FIG. 1;

FIG. 8 is an enlarged perspective view of the heavy-duty mounting backas shown in FIG. 1, depicting the environment of being mounted to apegboard that has been drawn in dotted lines and forms no portion of thepresent invention; and,

FIG. 9 is a cross-sectional view of the heavy-duty mounting back takenalong the line 9—9 in FIG. 8.

I claim the ornamental design for the heavy-duty mounting back, as shown and described. 